The longest bridge is The Danyang-Kunshan Grand Bridge, on the Jinghu High-Speed Railway which is 164 km long.

The longest bridge in the world is Danyang-Kunshan Grand Bridge of China Beijing-Shanghai High-Speed Railway is long 164,800 m (540,700ft) was completed 2010.

Danyang-Kunshan Grand Bridge, China

the lake pontchartrain bridge in louisiana ,26 miles. china recently built a bridge a little longer but ive been told that it collasped.